"Liberals" who have nothing better to do than to join fashionable causes.

This term derives from liberals who sit around and drink overpriced diluted Starbucks coffee while lamenting the plight of the poor.

Latte Liberals have no sense of discretion and usually forget what they're arguing about soon after other latte liberals judge newer causes (polygamy, discrimination against left-handers, etc.) to be more worthy.

An financially comfortable person who claims to support liberal causes, then acts completely different.

latte liberals disapprove of school vouchers for kids in poorly run urban schools yet take their children to private schools, therefore avoiding the problems of public schools. Protesting the war in Iraq, yet support Tibet freedom from China, which would be even more bloodier